Choose the correct explicit formula for the sequence below. 3, 6, 9, 12, 15

A. an=3 + 2(n - 1)
B. an=2 + 3(n - 1)
C. an=3 + 3(n - 1)
D. an=3 + 3(n)

First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.

The answer should be 5.